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	<head>
		<title>three.js webgpu - glTF + iridescence</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<link type="text/css" rel="stylesheet" href="example.css">
	</head>

	<body>

		<div id="info">
			<a href="https://threejs.org/" target="_blank" rel="noopener" class="logo-link"></a>

			<div class="title-wrapper">
				<a href="https://threejs.org/" target="_blank" rel="noopener">three.js</a><span>glTF + Iridescence</span>
			</div>

			<small>
				<a href="https://github.com/KhronosGroup/glTF/tree/master/extensions/2.0/Khronos/KHR_materials_iridescence" target="_blank" rel="noopener">KHR_materials_iridescence</a> Iridescence Lamp from <a href="https://github.com/KhronosGroup/glTF-Sample-Models/tree/master/2.0/IridescenceLamp" target="_blank" rel="noopener">glTF-Sample-Models</a><br />
				<a href="https://hdrihaven.com/hdri/?h=venice_sunset" target="_blank" rel="noopener">Venice Sunset</a> from <a href="https://hdrihaven.com/" target="_blank" rel="noopener">HDRI Haven</a>
			</small>
		</div>

		<script type="importmap">
			{
				"imports": {
					"three": "../build/three.webgpu.js",
					"three/webgpu": "../build/three.webgpu.js",
					"three/tsl": "../build/three.tsl.js",
					"three/addons/": "./jsm/"
				}
			}
		</script>

		<script type="module">

			import * as THREE from 'three/webgpu';

			import { OrbitControls } from 'three/addons/controls/OrbitControls.js';
			import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js';
			import { HDRLoader } from 'three/addons/loaders/HDRLoader.js';

			let renderer, scene, camera, controls;

			init().catch( function ( err ) {

				console.error( err );

			} );

			async function init() {

				renderer = new THREE.WebGPURenderer( { antialias: true } );
				renderer.setAnimationLoop( render );
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				renderer.toneMapping = THREE.ACESFilmicToneMapping;
				document.body.appendChild( renderer.domElement );

				scene = new THREE.Scene();

				camera = new THREE.PerspectiveCamera( 50, window.innerWidth / window.innerHeight, 0.05, 20 );
				camera.position.set( 0.35, 0.05, 0.35 );

				controls = new OrbitControls( camera, renderer.domElement );
				controls.autoRotate = true;
				controls.autoRotateSpeed = - 0.5;
				controls.target.set( 0, 0.2, 0 );
				controls.update();

				const hdrLoader = new HDRLoader()
					.setPath( 'textures/equirectangular/' );

				const gltfLoader = new GLTFLoader().setPath( 'models/gltf/' );

				const [ texture, gltf ] = await Promise.all( [
					hdrLoader.loadAsync( 'venice_sunset_1k.hdr' ),
					gltfLoader.loadAsync( 'IridescenceLamp.glb' ),
				] );

				// environment

				texture.mapping = THREE.EquirectangularReflectionMapping;

				scene.background = texture;
				scene.environment = texture;

				// model

				scene.add( gltf.scene );

				render();

				window.addEventListener( 'resize', onWindowResize );

			}

			function onWindowResize() {

				camera.aspect = window.innerWidth / window.innerHeight;

				camera.updateProjectionMatrix();

				renderer.setSize( window.innerWidth, window.innerHeight );

				render();

			}

			function render() {

				controls.update();
				renderer.render( scene, camera );

			}

		</script>

	</body>
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